Z06 bucking and surging?
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,016
Likes: 0
From: Bristol Ct
Z06 bucking and surging?
I checked everything cant find the problem, my 03 Zo6 has developed a surge, I’ll be driving down the road in any gear and it will start to hold back, surge. I’ve changed the plugs. Plug wires, cleaned everything in the air intake, changed the gas, changed brakes and rotors, and to make things worst no codes at all, anyone got a suggestion.
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,016
Likes: 0
From: Bristol Ct
Originally Posted by dwjz06
Did you change anything around the MAF area? Like a new cold air tube or any loose connections around the MAF. Some ideas to check on.
Instructor
Joined: Jun 2006
Posts: 220
Likes: 1
From: East Windsor NJ
Get some contact cleaner and clean the wires in the mass airflow sensor. Do NOT touch them, just spray them carefully. You want to make sure you use a quality contact cleaner that leaves no residue. Some people have used brake cleaner, but I am more comfortable with contact or circuit board cleaner.
Also, check for air leaks after the mass airflow sensor. I have also seen this behavior with bad O2 sensors but would check/clean the the MAF sensor first.
Also, check for air leaks after the mass airflow sensor. I have also seen this behavior with bad O2 sensors but would check/clean the the MAF sensor first.
Melting Slicks
Joined: May 2006
Posts: 2,417
Likes: 1
From: No place to legally ride ATV's NJ
Me too...
That's weird, my 98 just started doing that, too. It's very strange how it happens. I'll get in and take a short drive - everything's fine. Turn the car off, go inside a store. Come out a few minutes later, start er up, and it's running rough. Go to drive away, and it surges like crazy. Then in a few moments - gone. AND, it doesn't do it all the time. I'm gonna start troubleshooting this weekend when I have 5 days off. I'll let you know if I come up with anything.
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,016
Likes: 0
From: Bristol Ct
Originally Posted by HeadHunter1
Get some contact cleaner and clean the wires in the mass airflow sensor. Do NOT touch them, just spray them carefully. You want to make sure you use a quality contact cleaner that leaves no residue. Some people have used brake cleaner, but I am more comfortable with contact or circuit board cleaner.
Also, check for air leaks after the mass airflow sensor. I have also seen this behavior with bad O2 sensors but would check/clean the the MAF sensor first.
Also, check for air leaks after the mass airflow sensor. I have also seen this behavior with bad O2 sensors but would check/clean the the MAF sensor first.
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,016
Likes: 0
From: Bristol Ct
Originally Posted by DropTheTop
That's weird, my 98 just started doing that, too. It's very strange how it happens. I'll get in and take a short drive - everything's fine. Turn the car off, go inside a store. Come out a few minutes later, start er up, and it's running rough. Go to drive away, and it surges like crazy. Then in a few moments - gone. AND, it doesn't do it all the time. I'm gonna start troubleshooting this weekend when I have 5 days off. I'll let you know if I come up with anything.
Dogface
Joined: Jul 2004
Posts: 25,974
Likes: 120
From: At the Beach, FL
St. Jude Donor '15, '17
Originally Posted by Highroller
It has a Blackwing, but thats been on it for 2 years and the car only has 9k on it
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Pro
Joined: Sep 1999
Posts: 545
Likes: 0
From: San Jose, Ca./Kona, Hawaii
90% of surging is caused by unmetered air that is leaking upstream of the MAF, unless you have a large cam. I bet you have a leak somewhere between the MAF and throttle body. Check ALL clamps for tightness. I had a very small leak and my car would buck on the freeway. Once I found the small leak, problem solved. I have a blackwing also. They tend to get loose and need to be tightened every six months!
Melting Slicks
Joined: May 2006
Posts: 2,417
Likes: 1
From: No place to legally ride ATV's NJ
Originally Posted by davette
90% of surging is caused by unmetered air that is leaking upstream of the MAF, unless you have a large cam. I bet you have a leak somewhere between the MAF and throttle body. Check ALL clamps for tightness. I had a very small leak and my car would buck on the freeway. Once I found the small leak, problem solved. I have a blackwing also. They tend to get loose and need to be tightened every six months!
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,016
Likes: 0
From: Bristol Ct
Originally Posted by davette
90% of surging is caused by unmetered air that is leaking upstream of the MAF, unless you have a large cam. I bet you have a leak somewhere between the MAF and throttle body. Check ALL clamps for tightness. I had a very small leak and my car would buck on the freeway. Once I found the small leak, problem solved. I have a blackwing also. They tend to get loose and need to be tightened every six months!
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
I installed a BLACKWING on my '04 Z16 last weekend. Everything looked all tightened up, but closer inspection (with a flashlight) of the silicone hose connector at the throttle body revealed a problem.
The thin stainless worm drive hose clamp tightened down and squeezed out the very bottom of the hose leaving a very small almost undetectable gap. I applied a very light coating of grease and it was slipped on again. The clamp has to be very close to the throttle body or it'll slip off. My solution will be the special "t-bolt" clamps for all connections...they're wide and won't loosen up on the slippery silicone.
The thin stainless worm drive hose clamp tightened down and squeezed out the very bottom of the hose leaving a very small almost undetectable gap. I applied a very light coating of grease and it was slipped on again. The clamp has to be very close to the throttle body or it'll slip off. My solution will be the special "t-bolt" clamps for all connections...they're wide and won't loosen up on the slippery silicone.
Burning Brakes
Joined: Feb 2006
Posts: 1,085
Likes: 3
From: Ottawa Ontario, Canada
I sometimes get a very light "surging" when cruising at low RPM/high vacuum... like under 1500 RPM, in any gear. It doesn't happen often, and the car runs like a champ overall.
Could this be the same issue? If I remember correctly, the problem existed even with the stock intake before I installed my Halltech Stinger? I could be wrong...
Could this be the same issue? If I remember correctly, the problem existed even with the stock intake before I installed my Halltech Stinger? I could be wrong...
Advanced
Joined: Apr 2005
Posts: 70
Likes: 0
From: Ashland OR
I had similar issues of surging. I recently installed a catch can to catch oil vapors getting to my Throttle Body from my PCV. My problem was fixed when I removed the Throttle Position Sensor on the passenger side of the throttle body and cleaned some oil residue off of it with rubbing alcohol on the end of a q-tip. Now that I have the catch can in place I don't have oil getting in the throttle body and the probelm of surging has not returned. The throttle position sensor appears to have just not been acurately sensing the throttle position.
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,016
Likes: 0
From: Bristol Ct
Originally Posted by HeadHunter1
Get some contact cleaner and clean the wires in the mass airflow sensor. Do NOT touch them, just spray them carefully. You want to make sure you use a quality contact cleaner that leaves no residue. Some people have used brake cleaner, but I am more comfortable with contact or circuit board cleaner.
Also, check for air leaks after the mass airflow sensor. I have also seen this behavior with bad O2 sensors but would check/clean the the MAF sensor first.
Also, check for air leaks after the mass airflow sensor. I have also seen this behavior with bad O2 sensors but would check/clean the the MAF sensor first.
Dogface
Joined: Jul 2004
Posts: 25,974
Likes: 120
From: At the Beach, FL
St. Jude Donor '15, '17
Originally Posted by Highroller
I put the complete original air system back on and last night took a 50 mile ride to the shore, problem solved , after living with this for over a month every thing is perfect. I inspected every part that was removed and didn't find anything wrong, next move will be to re-install 1 part at a time and see if I can find the part thats bad, hope it's not the Blackwing.
Pro
Joined: Sep 1999
Posts: 545
Likes: 0
From: San Jose, Ca./Kona, Hawaii
Originally Posted by Highroller
I put the complete original air system back on and last night took a 50 mile ride to the shore, problem solved , after living with this for over a month every thing is perfect. I inspected every part that was removed and didn't find anything wrong, next move will be to re-install 1 part at a time and see if I can find the part thats bad, hope it's not the Blackwing.
Glad you were able to narrow down the issue. Even if it is just a small leak, you will get surging. The issue I had with mine was not the blackwing itself - but the connections from the MAF to the Throttle body. The airbridge (part that goes over the radiator plastic crown piece) seems to be a culprit in a lot of cases, including mine. It had started to crimp so it would not make a full airtight seal. I went back to the stock airbridge and it was fine. So, basically, I am running stock parts except the blackwing filter. Seems to work well.